Being Kind to Matt Hancock. What does 'every eight days' mean?

How much can we rely on government statistical claims in the current atmosphere, in which terrifying charts are published which are plainly guesswork and an official claim that Britain could face 50,000 Covid infections a day turns out to have been based on studies that involved just a few hundred positive cases?

In my inexpert way, I thought I would take a look at another example of a frightening assertion made recently by a person in authority. In the article below I have taken literally the ...